I’m not sure of the process you guys use to detail Fuchs style wheels, but I wanted to share what I tried recently.
I found this rattle can acid-etch primer on Amazon, as a bonus it’s available in black. Wiped the wheels with minieral spirits, masked, gave a light wipe with a Scotch Brite pad to try to create some tooth, then cleaned once more before spraying the etch primer. It lays down really nice right out of the can, so nice that I hated to top coat it:
It sets up quickly and is recommended to paint 10-15 minutes after spraying. Time will tell how well it holds up and if it adds any benefit over direct paint.